3. At least one unidimensionally measurable lesion meeting Response Evaluation Criteria in Solid Tumours (RECIST; version 1.1, Eisenhauer et al. 2009), longest diameter ≥10 mm with computed tomography (CT) scan [CT scan slice thickness no greater than 5 mm] , or ≥ 20 mm with chest x-ray. Positron emission tomography (PET) scans and ultrasounds should not be used.